Method and apparatus for calibrating channel between radio remote units rrus

An apparatus for calibrating a channel between radio remote units RRUs, wherein the apparatus comprises a processor and a memory connected to the processor, the memory is configured to store at least one instruction, and the instruction is executed by the processor after being instructed;

• the processor is configured to:
• for each subcarrier in M subcarriers in full bandwidth, instruct a reference RRU to transceive a calibration signal on the subcarrier by using a reference channel and a preset channel in a preset RRU, and calculate a calibration coefficient of the preset channel in the preset RRU relative to the reference channel in the reference RRU on the subcarrier, wherein 2≤M<N, N is a total quantity of subcarriers in the full bandwidth, and both M and N are integers;
• the processor is further configured to determine a first correspondence according to M calibration coefficients obtained by means of calculation, wherein the first correspondence comprises a correspondence between a frequency of each subcarrier in the full bandwidth and a first calibration coefficient, and the first calibration coefficient is the calibration coefficient of the preset channel in the preset RRU relative to the reference channel in the reference RRU on the subcarrier;
• and
• the processor is further configured to calibrate a transceiving response ratio of the preset channel in the preset RRU on each subcarrier according to the first correspondence.